2 #include <linux/types.h>
11 #define COMP(m) do { \
12 if (s1->m != s2->m) { \
13 pr_debug("Samples differ at '"#m"'\n"); \
18 #define MCOMP(m) do { \
19 if (memcmp(&s1->m, &s2->m, sizeof(s1->m))) { \
20 pr_debug("Samples differ at '"#m"'\n"); \
25 static bool samples_same(const struct perf_sample *s1,
26 const struct perf_sample *s2,
27 u64 type, u64 read_format)
31 if (type & PERF_SAMPLE_IDENTIFIER)
34 if (type & PERF_SAMPLE_IP)
37 if (type & PERF_SAMPLE_TID) {
42 if (type & PERF_SAMPLE_TIME)
45 if (type & PERF_SAMPLE_ADDR)
48 if (type & PERF_SAMPLE_ID)
51 if (type & PERF_SAMPLE_STREAM_ID)
54 if (type & PERF_SAMPLE_CPU)
57 if (type & PERF_SAMPLE_PERIOD)
60 if (type & PERF_SAMPLE_READ) {
61 if (read_format & PERF_FORMAT_GROUP)
65 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
66 COMP(read.time_enabled);
67 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
68 COMP(read.time_running);
69 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
70 if (read_format & PERF_FORMAT_GROUP) {
71 for (i = 0; i < s1->read.group.nr; i++)
72 MCOMP(read.group.values[i]);
78 if (type & PERF_SAMPLE_CALLCHAIN) {
80 for (i = 0; i < s1->callchain->nr; i++)
81 COMP(callchain->ips[i]);
84 if (type & PERF_SAMPLE_RAW) {
86 if (memcmp(s1->raw_data, s2->raw_data, s1->raw_size)) {
87 pr_debug("Samples differ at 'raw_data'\n");
92 if (type & PERF_SAMPLE_BRANCH_STACK) {
93 COMP(branch_stack->nr);
94 for (i = 0; i < s1->branch_stack->nr; i++)
95 MCOMP(branch_stack->entries[i]);
98 if (type & PERF_SAMPLE_REGS_USER) {
99 size_t sz = hweight_long(s1->user_regs.mask) * sizeof(u64);
101 COMP(user_regs.mask);
103 if (s1->user_regs.abi &&
104 (!s1->user_regs.regs || !s2->user_regs.regs ||
105 memcmp(s1->user_regs.regs, s2->user_regs.regs, sz))) {
106 pr_debug("Samples differ at 'user_regs'\n");
111 if (type & PERF_SAMPLE_STACK_USER) {
112 COMP(user_stack.size);
113 if (memcmp(s1->user_stack.data, s1->user_stack.data,
114 s1->user_stack.size)) {
115 pr_debug("Samples differ at 'user_stack'\n");
120 if (type & PERF_SAMPLE_WEIGHT)
123 if (type & PERF_SAMPLE_DATA_SRC)
126 if (type & PERF_SAMPLE_TRANSACTION)
132 static int do_test(u64 sample_type, u64 sample_regs_user, u64 read_format)
134 struct perf_evsel evsel = {
137 .sample_type = sample_type,
138 .sample_regs_user = sample_regs_user,
139 .read_format = read_format,
142 union perf_event *event;
144 struct ip_callchain callchain;
148 .data = {3, 201, 202, 203},
151 struct branch_stack branch_stack;
155 .data = {1, 211, 212, 213},
158 const u64 raw_data[] = {0x123456780a0b0c0dULL, 0x1102030405060708ULL};
159 const u64 data[] = {0x2211443366558877ULL, 0, 0xaabbccddeeff4321ULL};
160 struct perf_sample sample = {
171 .raw_size = sizeof(raw_data),
174 .raw_data = (void *)raw_data,
175 .callchain = &callchain.callchain,
176 .branch_stack = &branch_stack.branch_stack,
178 .abi = PERF_SAMPLE_REGS_ABI_64,
179 .mask = sample_regs_user,
183 .size = sizeof(data),
184 .data = (void *)data,
187 .time_enabled = 0x030a59d664fca7deULL,
188 .time_running = 0x011b6ae553eb98edULL,
191 struct sample_read_value values[] = {{1, 5}, {9, 3}, {2, 7}, {6, 4},};
192 struct perf_sample sample_out;
196 for (i = 0; i < sizeof(user_regs); i++)
197 *(i + (u8 *)user_regs) = i & 0xfe;
199 if (read_format & PERF_FORMAT_GROUP) {
200 sample.read.group.nr = 4;
201 sample.read.group.values = values;
203 sample.read.one.value = 0x08789faeb786aa87ULL;
204 sample.read.one.id = 99;
207 sz = perf_event__sample_event_size(&sample, sample_type, read_format);
208 bufsz = sz + 4096; /* Add a bit for overrun checking */
209 event = malloc(bufsz);
211 pr_debug("malloc failed\n");
215 memset(event, 0xff, bufsz);
216 event->header.type = PERF_RECORD_SAMPLE;
217 event->header.misc = 0;
218 event->header.size = sz;
220 err = perf_event__synthesize_sample(event, sample_type, read_format,
223 pr_debug("%s failed for sample_type %#"PRIx64", error %d\n",
224 "perf_event__synthesize_sample", sample_type, err);
228 /* The data does not contain 0xff so we use that to check the size */
229 for (i = bufsz; i > 0; i--) {
230 if (*(i - 1 + (u8 *)event) != 0xff)
234 pr_debug("Event size mismatch: actual %zu vs expected %zu\n",
239 evsel.sample_size = __perf_evsel__sample_size(sample_type);
241 err = perf_evsel__parse_sample(&evsel, event, &sample_out);
243 pr_debug("%s failed for sample_type %#"PRIx64", error %d\n",
244 "perf_evsel__parse_sample", sample_type, err);
248 if (!samples_same(&sample, &sample_out, sample_type, read_format)) {
249 pr_debug("parsing failed for sample_type %#"PRIx64"\n",
257 if (ret && read_format)
258 pr_debug("read_format %#"PRIx64"\n", read_format);
263 * test__sample_parsing - test sample parsing.
265 * This function implements a test that synthesizes a sample event, parses it
266 * and then checks that the parsed sample matches the original sample. The test
267 * checks sample format bits separately and together. If the test passes %0 is
268 * returned, otherwise %-1 is returned.
270 int test__sample_parsing(void)
272 const u64 rf[] = {4, 5, 6, 7, 12, 13, 14, 15};
274 u64 sample_regs_user;
279 * Fail the test if it has not been updated when new sample format bits
280 * were added. Please actually update the test rather than just change
281 * the condition below.
283 if (PERF_SAMPLE_MAX > PERF_SAMPLE_TRANSACTION << 1) {
284 pr_debug("sample format has changed, some new PERF_SAMPLE_ bit was introduced - test needs updating\n");
288 /* Test each sample format bit separately */
289 for (sample_type = 1; sample_type != PERF_SAMPLE_MAX;
291 /* Test read_format variations */
292 if (sample_type == PERF_SAMPLE_READ) {
293 for (i = 0; i < ARRAY_SIZE(rf); i++) {
294 err = do_test(sample_type, 0, rf[i]);
301 if (sample_type == PERF_SAMPLE_REGS_USER)
302 sample_regs_user = 0x3fff;
304 sample_regs_user = 0;
306 err = do_test(sample_type, sample_regs_user, 0);
311 /* Test all sample format bits together */
312 sample_type = PERF_SAMPLE_MAX - 1;
313 sample_regs_user = 0x3fff;
314 for (i = 0; i < ARRAY_SIZE(rf); i++) {
315 err = do_test(sample_type, sample_regs_user, rf[i]);